<template>
  <div class="star" :class="starType">
    <span v-for="itemClass in itemClasses" :class="itemClass" class="star-item"></span>
  </div>
</template>

<script type="text/ecmascript-6">
  const LENGTH = 5
  const CLA_ON = 'on'
  const CLA_HALF = 'half'
  const CLA_OFF = 'off'
  export default {
    props: {
      size: {
        type: Number
      },
      score: {
        type: Number
      }
    },
    computed: {
      starType() {
        return 'star-' + this.size
      },
      itemClasses(){
        let result = []
        let score = Math.floor(this.score * 2) / 2
        let hasDecimal = score % 1 != 0
        let integer = Math.floor(score)
        for (var i = 0; i < integer; i++) {
          result.push(CLA_ON)
        }
        if (hasDecimal) {
          result.push(CLA_HALF)
        }
        while (result.length < LENGTH) {
          result.push(CLA_OFF)
        }
        return result

      }
    }
  }
</script>

<style lang="stylus" rel="stylesheet/stylus">
  @import "../../common/stylus/mixin.styl"

  .star
    margin-top: 16px
    text-align: center
    font-size: 0
    .star-item
      display: inline-block
      background-size: 100%
      background-repeat: no-repeat
    &.star-48
      .star-item
        width: 20px
        height: 20px
        margin-right: 22px
        &:last-child
          margin-right: 0
        &.on
          bg-image("star48_on")
        &.half
          bg-image("star48_half")
        &.off
          bg-image("star48_off")
    &.star-36
      .star-item
        width: 15px
        height: 15px
        margin-right: 6px
        &:last-child
          margin-right: 0
        &.on
          bg-image("star36_on")
        &.half
          bg-image("star36_half")
        &.off
          bg-image("star36_off")
    &.star-24
      .star-item
        width: 10px
        height: 10px
        margin-right: 3px
        &:last-child
          margin-right: 0
        &.on
          bg-image("star24_on")
        &.half
          bg-image("star24_half")
        &.off
          bg-image("star24_off")
</style>
